Chemical materials are divided into metal materials and non-metal materials. Chemical metal materials can also be divided into black metal materials and non-ferrous metal materials. Ferrous materials mainly refer to iron and steel, and most chemical machinery equipment is made of cast iron and carbon steel. High alloy iron, high alloy steel (such as high silicon iron, high nickel iron and various stainless steel), nickel, copper, aluminum, titanium, zirconium and their alloys are also widely used in chemical production. Non-metallic materials are widely used in the chemical industry, including plastics, rubber, glass, ceramics, enamel, opaque graphite and so on. Plastics develop rapidly, good corrosion resistance, the most widely used; Opaque graphite heat resistance, acid resistance, high thermal conductivity, large use; Ceramic, glass, good acid resistance, but brittle, can not manufacture large equipment, limited use, but can be used for enamel, lined metal surface, corrosion resistant enamel equipment, enamel (or lined) glass slots, cans, etc.